Datasheet > ADUM1254

ADUM1254

更新时间： 2024-11-21 17:01:15

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
18页	1708K
描述
Bidirectional I2C Isolator with Idle-Bus Hot Swap and Low VOL

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中文翻译

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ADUM1254 数据手册

Bidirectional I²C Isolator with Idle-Bus Hot

Swap and Low V_OL

ADuM1254

Benefits and Features

General Description

The ADuM1254 offers two bidirectional, open-drain

•

Low V

for Greater I C Device Compatibility

OL(MAX)

• Side 1: 0.69V

• Side 2: 0.4V

channels for applications, such as I C, that require data

to be transmitted in both directions on the same line. To

prevent latch-up action, side 1 outputs comprise special

buffers that regulate the logic-low voltage at 0.64V and

the input logic-low threshold is at least 50mV lower than

the output logic-low voltage. Side

conventional buffers that do not regulate logic-low output

voltage.

•

Independent V

/V Supplies Supports 3.3V

DD1 DD2

and 5V Logic Voltage Levels and Allows Level

Shifting

features

•

2.25V to 5.5V for Both Sides

•

Enhanced Hot Swappable Side 2 I/Os

• Initial Side 2 Connection Occurs at Bus Idle or

Stop States to Prevent Data Corruption

The ADuM1254 features independent 2.25V to 5.5V

supplies on both side 1 and side 2 of the isolator. The

device operates up to 2MHz.

•

Bidirectional I C Data Transfer up to 2MHz SCL

Bidirectional SCL for Advanced Bus Topologies

• Supports Clock Stretching and Multiple

Controllers Across Isolation Barrier

The ADuM1254 provides

a disturbance-free bus

connection for hot-plug connections on side 2 by first

precharging the bus pins and then monitoring the bus

state for either an idle bus or detection of a I C stop

condition before connecting side 1 and side 2.

•

Strong Current Sinking Enables Lower R

PULL-UP

Values for Faster Bus Speeds

• Side 1: 5mA

• Side 2: 50mA

The ADuM1254 is available in an 8-pin narrow-body

SOIC package. The device is rated for operation at

ambient temperatures of -40°C to +125°C.

Robust Galvanic Isolation of Digital Signals

• Continuously Withstands (V

)

IOWM

RMS

- 8 Narrow SOIC: 445V

• Withstands ±10kV Surge per IEC 61000-4-5

• Three Packages with Creepage and Clearance

- 8 Narrow SOIC: 4mm

Key Applications

•

Isolated I C/SMBus Interface

Battery Management Systems

Power Over Ethernet (PoE)

Motor Control Systems

•

Safety and Regulatory Approvals (Pending)

• IEC 60747-17 (Pending)

- Reinforced V

Narrow SOIC: 63V

IORM

• UL 1577 (Pending)

- 8 Narrow SOIC: 3000V

PEAK

Simplified Application Diagram

for 1min

RMS

3.3V

1.8V

• IEC/EN/CSA 62368-1 (Pending)

• IEC/EN/CSA 61010-1 (Pending

• CAN/CSA-C22.2 No. 14-18 (Pending)

0.1µF

1nF

0.1µF

1nF

DD1

DD2

ADuM1254

SDA2

SCL2

SDA

SCL

SDA

SCL

SDA1

SCL1

Ordering Information appears at end of data sheet.

µC

GND1

GND2

19-101762; Rev 0; 10/23

12 3 4 5 6 7...18

中文翻译

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与ADUM1254相关器件

型号	品牌	获取价格	描述	数据表
ADUM1255	ADI	获取价格	I2C Isolator with Unidirectional SCL, Idle-bus Hotswap and Low VOL
ADUM1280	ADI	获取价格	3 kV RMS Dual Channel Digital Isolators
ADUM1280ARZ	ADI	获取价格	3 kV RMS Dual Channel Digital Isolators
ADUM1280ARZ-RL7	ADI	获取价格	3 kV RMS Dual Channel Digital Isolators
ADUM1280BRZ	ADI	获取价格	3 kV RMS Dual Channel Digital Isolators
ADUM1280BRZ-RL7	ADI	获取价格	3 kV RMS Dual Channel Digital Isolators
ADUM1280CRZ	ADI	获取价格	3 kV RMS Dual Channel Digital Isolators
ADUM1280CRZ-RL7	ADI	获取价格	3 kV RMS Dual Channel Digital Isolators
ADUM1280WARZ	ADI	获取价格	3 kV RMS Dual Channel Digital Isolators
ADUM1280WBRZ	ADI	获取价格	3 kV RMS Dual Channel Digital Isolators

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